Why does amenorrhea become more likely in the luteal phase due to excessive exercise?

💡 Explanation

Amenorrhea in excessive exercise during the luteal phase increases because an energy deficit interferes with the pulsatile release of gonadotropin-releasing hormone (GnRH), therefore impairing normal hormonal cycles, rather than a direct impact from estrogen or LH.

• Why does orally administered morphine exhibit significantly lower analgesic potency compared to intravenous administration in treating post-operative pain?
• Which risk increases when gallbladder bile secretion encounters occlusion?
• If a patient with type 1 diabetes mistakenly injects twice their prescribed insulin dose, which consequence follows?
• Which outcome becomes likely when antibiotic resistance genes undergo horizontal transfer via plasmids in a bacterial lung infection?
• If a researcher introduces a novel compound that completely inhibits phospholipase A2 (PLA2) activity in macrophages stimulated with lipopolysaccharide (LPS), which consequence follows regarding the inflammatory response?
• If an individual with iodine deficiency develops increased thyroid-stimulating hormone (TSH) levels, which compensatory change is least likely?